Ventilation Requirements - Thermo Scientific VH-D20 Operating Manual

5.3.4

Ventilation Requirements

Charged Aerosol Detectors (VH-D20, VF-D20)
Operating Manual
CAUTION—Hazardous Fumes
The exhaust gas of the detector may contain hazardous fumes that pose
health and safety risks.
• Avoid an accumulation of gas. The exhaust gas must always be
removed by proper ventilation.
• Make sure that the installation site is well ventilated. Do not vent
directly into the laboratory.
NOTICE
A vacuum in the ventilation can cause a depressurization inside the
detector. This can impair detector operation and lead to a decreased
performance.
Avoid a vacuum or a negative pressure in the ventilation of the detector.
In addition to the operating conditions for ventilation stated in the
Vanquish System Operating Manual, make sure that the location fulfils
the following requirements.
• Operate the detector nearby the gas supply and ventilation sources.
• Ventilation must be at atmospheric pressure with no vacuum and no
positive pressure applied.
• Exhaust ventilation rate must be at least 4 L/min. per charged
aerosol detector.
• Install the detector in a well-ventilated laboratory. Exhaust gases
(including carrier gas, vaporized eluents and solute micro particles)
exit on the right side of the detector through the gas exhaust port.
The exhaust gas may contain volatile organic compounds in low
concentration. Make sure that the detector is properly vented.
Direct the gas exhaust tubing to a fume hood or connect it to
another ventilation device such as an industrial vent. Prevent a gas-
tight connection and siphons between the gas exhaust port of the
detector and the ventilation.
5 • Installation
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